Instruction Manual

IM CA150E

RSLogix 500

Write Message

Once the Control Block is designated, the Setup Screen can be conﬁ gured. The ﬁ rst item to ﬁ ll in is the location of the data that

is to be written from the PLC to the MW100, designated as the Data Table Address. In this case N7:49 is chosen with an element

size of 1 (one byte of data - in order to read or write large amounts of data in a single message, increase the elements size to

the appropriate value). Channel 0 designates what port to use on the PLC (in this case the serial port for DF1 communications

– later routed via a DigiOne IAP (DF1 to EIP gateway)).

The next step is to conﬁ gure where the message will be written. In this case a Message Timeout of 5 seconds is used and Com-

munication Channel C001 is being written to as an integer using the syntax N30:0 for Data Table Address. In this case Local

Node Addr is set to 1 so that the gateway device knows to route all commands issued to Node 1 to the IP address of a speciﬁ c

MW100. If multiple MW100s are on a network then using different Node Addresses within the message commands can be used

in conjunction with a gateway to route messages to speciﬁ c MW100s (e.g., Node 1 to MW100 A, Node 2 to MW100 B, etc…).

Write Message Setup Screen as conﬁ gured for PLCs that support DF1